Here's an issue you don't here often in aviation: 'it needs to be heavier'.
In a lifetime in and around aviation I never yet encountered an effort to add weight to a flying machine from choice. The only exceptions that spring to mind involve the weight and balance calculation: take a radar out of the nose of a fighter jet and you generally need to add a lead weight to compensate for its loss. Else, you add ballast to an airship to compensate for the lack of a payload that might include either cargo or passengers: without which it is headed skyward pretty fast.
This nice man on YouTube however discovered that left to itself at just 15kg it does not hover well at all: for its propellers are turning too slowly to react sufficiently fast enough to adjust its attitude and position.
It is for reasons like this that I am glad to be applying such propellers and motors to seaborne instead of airborne drones. For besides the issue of ballast, the latter use a considerable amount of energy from having to constantly alter the RPM of each of its motors... while maritime drones are either cruising at a constant RPM or loitering at zero.
Nor does there appear to be any reason why in building them I should be looking to add extra weight; as we shall continue to see in subsequent posts.
